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Core i5-9600KF vs i7-6700K


Description
The i5-9600KF is based on Coffee Lake architecture while the i7-6700K is based on Skylake.

Using the multithread performance as a reference, the i5-9600KF gets a score of 371.1 k points while the i7-6700K gets 254.6 k points.

Summarizing, the i5-9600KF is 1.5 times faster than the i7-6700K . To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
906ec
506e3
Core
Coffee Lake-S
Skylake-S
Architecture
Base frecuency
3.7 GHz
4 GHz
Boost frecuency
4.6 GHz
4.2 GHz
Socket
LGA 1151
LGA 1151
Cores/Threads
6/6
4/8
TDP
95 W
95 W
Cache L1 (d+i)
6x32+6x32 kB
4x32+4x32 kB
Cache L2
6x256 kB
256 kB
Cache L3
9216 kB
8192 kB
Date
January 2019
May 2015
Mean monothread perf.
77.34k points
63.22k points
Mean multithread perf.
371.08k points
254.56k points

Non-optimized benchmark
The benchmark in Mode 0 (FPU) measures cpu performance with non-optimized software. It uses the basic µinstructions from the i386 architecture with the i387 floating point unit. This mode is compatible with all CPUs so it's practical to compare very different CPUs
Monothread
i5-9600KF
i7-6700K
Test#1 (Integers)
4.63k
4.07k (x0.88)
Test#2 (FP)
19.43k
16.62k (x0.86)
Test#3 (Generic, ZIP)
6.17k
5.23k (x0.85)
Test#1 (Memory)
13.82k
6.28k (x0.45)
TOTAL
44.04k
32.2k (x0.73)

Multithread

i5-9600KF

i7-6700K
Test#1 (Integers)
26.64k
16.37k (x0.61)
Test#2 (FP)
110.11k
77.34k (x0.7)
Test#3 (Generic, ZIP)
33.07k
25.65k (x0.78)
Test#1 (Memory)
8.3k
10.21k (x1.23)
TOTAL
178.11k
129.57k (x0.73)

SSE3 optimized benchmark
The benchmark in mode I (SSE) is optimized for the use of SIMD instructions with 128 bits register and the SSE set up to version 3. Nearly every modern CPU has support for this mode.
Monothread
i5-9600KF
i7-6700K
Test#1 (Integers)
16.5k
14.73k (x0.89)
Test#2 (FP)
24.35k
21.27k (x0.87)
Test#3 (Generic, ZIP)
6.54k
5.52k (x0.84)
Test#1 (Memory)
13.59k
6.32k (x0.47)
TOTAL
60.98k
47.84k (x0.78)

Multithread

i5-9600KF

i7-6700K
Test#1 (Integers)
93.78k
61.09k (x0.65)
Test#2 (FP)
134.47k
99.17k (x0.74)
Test#3 (Generic, ZIP)
32.24k
26.57k (x0.82)
Test#1 (Memory)
8.22k
10.26k (x1.25)
TOTAL
268.71k
197.09k (x0.73)

AVX2 optimized benchmark
The benchmark in mode III (AVX2), like AVX1, is optimized to used 256 bits registers beside the second version of the Advanced Vector Extensions (AVX). The first AVX2 compatible CPU was released in 2013.
Monothread
i5-9600KF
i7-6700K
Test#1 (Integers)
30.52k
25.78k (x0.84)
Test#2 (FP)
26.54k
23.08k (x0.87)
Test#3 (Generic, ZIP)
6.41k
5.32k (x0.83)
Test#1 (Memory)
13.87k
9.03k (x0.65)
TOTAL
77.34k
63.22k (x0.82)

Multithread

i5-9600KF

i7-6700K
Test#1 (Integers)
174.66k
112.83k (x0.65)
Test#2 (FP)
154.06k
106.86k (x0.69)
Test#3 (Generic, ZIP)
34.11k
25.76k (x0.76)
Test#1 (Memory)
8.24k
9.12k (x1.11)
TOTAL
371.08k
254.56k (x0.69)

Performance/W
i5-9600KF
i7-6700K
Test#1 (Integers)
1839 points/W
1188 points/W
Test#2 (FP)
1622 points/W
1125 points/W
Test#3 (Generic, ZIP)
359 points/W
271 points/W
Test#1 (Memory)
87 points/W
96 points/W
TOTAL
3906 points/W
2680 points/W

Performance/GHz
i5-9600KF
i7-6700K
Test#1 (Integers)
6635 points/GHz
6139 points/GHz
Test#2 (FP)
5769 points/GHz
5495 points/GHz
Test#3 (Generic, ZIP)
1394 points/GHz
1268 points/GHz
Test#1 (Memory)
3015 points/GHz
2150 points/GHz
TOTAL
16813 points/GHz
15052 points/GHz

Monothread performance graph
Monothread performance graphics gives the performance vs time. They are useful to measure the time it takes to the CPU to reach the maximum performance.

Usually, CPU's performance will be steady during these tests but if it has a slow frequency strategy, the first samples will show a lower score.


Test#1 (Integers) [points vs time]

grafica bm.hardlimit.com


Test#2 (FP) [points vs time]

grafica bm.hardlimit.com


Test#3 (Generic, ZIP) [points vs time]

grafica bm.hardlimit.com


Test#1 (Memory) [points vs time]

grafica bm.hardlimit.com

Multithread performance graph
Multithread graphs measure the performance against a heavy load during certain time.

If CPU's TDP doesn't limit the frequency and the machine is properly cooled, performance should remain steady vs time. Otherwise, the performance score will oscillate or decrease over time.


Test#1 (Integers) [points vs time]

grafica bm.hardlimit.com


Test#2 (FP) [points vs time]

grafica bm.hardlimit.com


Test#3 (Generic, ZIP) [points vs time]

grafica bm.hardlimit.com


Test#1 (Memory) [points vs time]

grafica bm.hardlimit.com

Hardlimit Benchmark Central - Ver. 3.11.4